Add a sub.
Edde,
I would also recommend adding a powered sub to your two channel system. This will make it a 2.1 system and you can use the settings on the receiver to set the crossover to 60 or 80 Hz depending on the frequency response of your monitors.
In the entry level price range, a lot of products produce boomy, sloppy bass. For $200, check out the Onix X-sub. It only has an 8" woofer, but it will produce tight, clean bass down to the 30 Hz range which should be adequate for music.
Also, FYI, your Alysis Monitors are designed for near field listening (your ears are a couple feet from the speaker). That doesn't mean that they don't work well as bookshelf speakers, but they are designed for a different purpose.